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Libro de Resúmenes / Book of Abstracts (Español/English)

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Resumenes 42<br />

biological mo<strong>de</strong>ls we should contain the own uncertainties <strong>of</strong> the studied<br />

phenomenon.<br />

In this paper, we introduced another point <strong>of</strong> view <strong>of</strong> populational<br />

dynamics using the theory <strong>of</strong> fuzzy differential inclusions. We study the life<br />

expectations <strong>of</strong> a set <strong>of</strong> workers, supposing that the poverty be a factor that<br />

contributes to the increase <strong>of</strong> the rate <strong>of</strong> mortality. In this case, the<br />

poverty is a fuzzy set which has support varying with the time.<br />

Referencias<br />

[1] Aubin, J.P. and Cellina, A.(1984), Differential Inclusions, Springer-Verleg,<br />

New york Tokyo.<br />

[2] Bassanezi,R.C. and Barros, L.C.(1995), ``A simples mo<strong>de</strong>l <strong>of</strong> life expectancy<br />

with subjetive parameters'', Kibernetes: Inter. Journal <strong>of</strong> Systems and<br />

Cybernetics, vol. 9, No 24, pp. 91-98.<br />

[3] Barros, L.C., Bassanezi, R.C. and Tonelli, P.A.(2000), ``Fuzzy mo<strong>de</strong>lling in<br />

population dynamics'', Ecological Mo<strong>de</strong>lling, vol. 128, No 2, pp. 27-33.<br />

[4] Chalco-Cano, Y., Rojas-Medar, M.A., and Brandão, A.J.V. (2004), ``On the<br />

differentiability <strong>of</strong> fuzzy-valued mappings and the stability <strong>of</strong> a fuzzy<br />

differential inclusion''. Submitted to publication.<br />

[5] Chalco-Cano, Y., Rojas-Medar, M.A., and Brandão, A.J.V.(2005), ``Fuzzy<br />

quasilinear spaces'', Fuzzy Sets and Systems , V. 152, 173-190.<br />

[6] M. Guo and R. Li, (2003), Impulsive functional differential inclusions and<br />

fuzzy population mo<strong>de</strong>ls, Fuzzy Sets and Systems 138, 601-615.<br />

[7] M. Guo, Xiaoping Xue and R. Li, (2003).The oscillation <strong>of</strong> <strong>de</strong>lay differential<br />

inclusions and fuzzy biodynamics mo<strong>de</strong>ls, Mathematical and Computer<br />

Mo<strong>de</strong>lling 37, 651-658<br />

[8] Krivan, V. and Colombo, G.(1998), ``A non-stochastic approach for<br />

mo<strong>de</strong>lling uncertainty in population dinamics'', Bulletin <strong>of</strong> Mathematical<br />

Biology, vol.60, 721-751.<br />

[9] May, R.(1973), ``Stability in Ramdomly Fluctuating versus Deterministic<br />

Environments'', The American Naturalist, pp. 621-650.<br />

[10] Zhu, Yuanguo and Rao, Ling (2000), ``Differential Inclusions for Fuzzy<br />

Maps'', Fuzzy Sets Syst., vol. 112, pp. 257-261.

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